Igneus Depths

Igneus Depths is the extended area deep down the volcano Mt. Igneus. It is also the deepest part of the volcano, hence the name "Depths", and it is formed by multiple circling loops going all the way down to the molten lava. A lava-fall can be clearly seen in the middle of these loops. At the very bottom of this area, a long path leads to the Legendary Pokémon Heatran. HM8 Rock Climb and the Harvest Badge is required for the player to gain access to this area.

Catching Heatran
In the lowest level of Igneus Depths, Heatran can be seen at the end of the long path. Once the player clicks on Heatran, it will give out a loud roar, and the battle will commence. Players only have 1 chance to catch it, so save beforehand and turn off the auto save function.

Walking
All Pokémon are encountered at Lv.25-27.

Legendary Pokémon
Players only have 1 chance to battle the following Pokémon. Save beforehand and turn off the Auto Save function.

Trivia

 * With 4 out of the 5 wild Pokémon species giving Special Attack Effort Values, this is the best place to train the Sp. Atk stat of players' Pokémon.